Photon scattering by a three-level emitter in a one-dimensional waveguide

TL;DR

This paper analyzes photon scattering by a three-level emitter in a 1D waveguide, revealing applications in quantum computing, tunable photonic band gaps, and photon localization control.

Contribution

It provides a closed-form solution for photon scattering in various emitter configurations and explores their potential for quantum information processing and photonic control.

Findings

Deterministic emitter state switching via Raman scattering.

Tunable photonic band gap in emitter arrays.

External control of photon localization length.

Abstract

We discuss the scattering of photons from a three-level emitter in a one-dimensional waveguide, where the transport is governed by the interference of spontaneously emitted and directly transmitted waves. The scattering problem is solved in closed form for different level structures. Several possible applications are discussed: The state of the emitter can be switched deterministically by Raman scattering, thus enabling applications in quantum computing such as a single photon transistor. An array of emitters gives rise to a photonic band gap structure, which can be tuned by a classical driving laser. A disordered array leads to Anderson localization of photons, where the localization length can again be controlled by an external driving.